What if Vice admiral Mikawa decided against all instinct and advice to press on the attack and expend every single last round and torpedo in attacking the transports that were vital to supplying the US marines and finishing off the remaining allied naval presence (i.e. sinking the remaining cruisers like HMAS Australia with the Allied admirals onboard) and bombarding Henderson field to destroy the equipment and planes there vital to local air supremacy?

On a less serious note, what if the battle was simulated on WoWs (looks like USN/ Australians had advantage on paper)- perhaps with the missing ships omitted